public class Test4 {
    public static void main(String[] args) {
        int []arr = {1,2,3,4,5,6,7,8,9,10};
        for (int i = 0; i < arr.length; i++) {
            if(arr[i] % 2 == 0)
                arr[i] /= 2;
            else
                arr[i] *= 2;
            System.out.printf("%d ",arr[i]);
        }
    }
}
